Decoupled current control and sensor fault detection with second‐order sliding mode for induction motor

Abstract

This study proposes a new decoupled control method for induction motor (IM) based on higher order sliding mode (HOSM) controller. The proposed controller serves dual purpose by offering decoupled control and sensor fault detection. In this scheme, the decoupled control of d − q currents does not require the knowledge of the speed. The HOSM controllers play the same role as the compensation voltages produced by a decoupling compensator. From the compensation voltages, the speed can be estimated accurately through algebraic calculations. The estimated and actual speeds are then employed for fault detection algorithm to detect the fault. Simulations on a 1/4-hp three-phase IM in the presence of random measurement noise highlights the performance of the proposed approach for decoupling current control and robust sensor fault detection.

Robust Speed Control of PMSM Using Sliding Mode Control (SMC)—A Review

“…Second order SMC has been implemented in many systems [96][97][98][99][100][101] and for many machine types, e.g., DC motors [39,93,102], PMSM [103], induction motors [104] and induction generators [105,106]. For speed control of PMSM, SOSMC resulted in smaller output deviations, smaller convergence time of up to 66% and smaller chattering in comparison with first order SMC [94,107,108].…”

Experimental Investigation of Passive Fault Tolerant Control for Induction Machine Using Sliding Mode Approach

“…In order to ensure the asymptotical stability of the IM with the proposed control law, the convergence of the states and the sliding manifold of the system and so the stability, the dynamic ISMC laws designed as presented (11) and (16) are used. These use the Lyapunov theory of stability to determine the required condition for the existence of the sliding mode.…”

“…The IM subject to trajectory tracking is tested with T L = 7N.m load disturbance. The ISMC and the SOSMO parameters used in (11), (16) and (34) are selected as presented in Table II.…”

Performance of the Stator Winding Fault Diagnosis in Sensorless Induction Motor Drive

“…There are different kinds of sliding-mode based speed estimators: Sliding mode observers [34,35], MRAS-type SM estimators [36,37], discrete time estimators [38,39], second order SM estimators [40], and many others. The SM observers are also used to diagnose some IM faults: Broken bars [41], stator inter-turn short-circuits [42,43] inverter transistor faults [44], and speed sensor faults [45].…”